Welding machine



July 14, 1936. A. F. BELL. 2,Q47,305

WELDING MACHINE Filed June 50, 1930 15 Sheets-Sheet 1 INVENTORI ATTORNEYS I July 14, 1936.

A. F BELL WELDING MACHINE Filed June 50, 1950 13 Sheets-Sheet 2 INVENTORMad-EM 1 BY \fm ATTORNEYS.

July 14, 1936. A. F. BELL WELDING MACHINE Filed June 50, 1950 13Sheets-Sheet 5 r N T R N k w NQ N ill...

I NVENTOR 9 ATTORNEYS A. F. BELL WELDING MACHINE Filed June so, 1930 15Sheets-Shet 4 (III I l A'ITDRNEYS July 14, 1936. A. F; BELL WELDINGMACHINE Filed June so, 1930 13 Sheets-Sheet 5 I NVENTOR I 9" -wuATTORNEYS.

July 14, 1936. A. F. BELL WELDING MACHINE Filed June 50/1930 15Shets-Sheet 6 Bag- . INVENTOR Jul -'14, 1936.- BELL 2,047,305

WELDING MACHINE Filed June 50, 1930 13 Sheets-Sheet 'T INVENTOR:

' ATTORNEYS. I

Q E B July 14, 1936. A. F. BELL 2,047,305 I WELDING MACHINE Filed June50, 1930 13 Sheets-Sheet 8 Kill 5' HF Iii. u

' INVENTOR A'lToRNEY A.F.BELL

WELDING MAC INE July 14, 1936.

13 Sheets-Sheet 9 Filed June 50,1950

s 1 N m 3i m: m m 2m 9m N\\ Y nm B m3 m: @e g:

July 14, 1936. A F. BELL 2,047,305

WELDING MACHINE 1 Filed June 30, 1950 13 Sheets-Sheet 11 ATTORNEYS.

July 14,1936. A. F.- BELL 2,047,305

WELDING MACHINE Filed June 50, 1930 I 13 Sheets-Sheet '12 ATTORNEYS.

A. F. BELL July'14, 1936.

WELDING MACHINE Filed June 50, 1950 13 Sheet's-Shet l3 iNVENTOR 2 M,-243.14

A ORNEYJ.

Patented July 14,- 1936 UNITE n STATES WELDING 'MACHINE Andre; r.BeilrBufl 'aio N. assignments U o Y.,-'sssignor, by mesne, n Carbideand.'0arbon Corporation, a corporation oi New York Application June 30,1930, Serial No.- 464,984

sacrum.

The invention relates to buttwelding machines which are especiallyuseiul tor butt welding hollow objects such as pipes and cylindricalobjects but other forms may be welded;

One object of the invention is to provide a machine in which the weldmay be produced by impacting the ends of the heated articles.

Another object of the inventionis to provide means for welding hollowarticles without the use m 01 Another object of the invention is to.provide controlling devices for the various operations necessary vforproducing the weids'whiclidevices may bgcontrolle'd by one operator.

The invention will be more fully understood from the description whichrefers to the drawins! constituting a part hereof in which: I

Figure 1 is a left side 'ele'vational view or the machine with partsbroken away.

Figure 2 is a longitudinal section'ot the marichnijtaken substantiallyon the line 2-4 .of Figure 8 is a right-end elevational view ot the-mschineshowingpartsbrokenaway andpartsin section.

t upp y Figurefiisaverticalseotionalviewoithema- .chine takensubstantially along the line H of Pig. 1.

1 'igure dis a vertical sectional view of the mschinetakenalongthelineHoiFig; 1.

18 alongthelineil-ll Fig.9; V Figure llisanenlargedviewoioneoithewelding torches with parts broken away showing the noula tip andthemixing nodes in section.

121s across sectional view oi the burntaken along the line i2'l2 of Fig;11.

taken along-the line iI-lS-ot Fiat 12.

. fla l view noszleshown 18 is a oi a 'Figmedisanenlargedcmssseetionalviewoi' drumtaken along thelineH of acrosssectionai viewotthetorch l'igureiaisacmsssectionslviewotthetoreh iiisacrosssectional viewsndanend(Ci. vs -ss) glamging device taken 'along'the line i5-.-i5 of I Figure16 is an enlarged sectional view of the lower rollers taken along theline iii-i6 of Fig. 3. I

Figure 17 isa top plan view of the lower rollers,

I Figure'18 isanenlarged sectional-view orthe ugger rollers taken alongthe line II-l8 of Fig. 3

Figure 19 a tic representation of the arrangement 0! the hydraulicelements and 10 thalclamping means-which are associated there- Themachine is mounted on a frame preferably oonsistir'igot longitudinalI-beams I of which there may be four. The side longitudinal beamspreferably; but not necessarily consist 01 upper and lower halves whichmaybe taken apart and A iastened together by bolts 2. Yokes 8, 4,-andare Iixedly secured .to the longitudinal beams,-

the beams serving to form tying members (or yokes 3, l. and i. I'lhe'okes 'preierably consist ot'upper-and lower hal which-are split in ahorizontal plane and welded to the side I beams. The upper and lowerhalves of. the yokes may be held together by thebolts 2 whichpassthrough eentsothattheircontactwillbealongtwo separated longitudinalelementsot a cylindrical ob- -.ieot. The upper guide rollers 6 aremounted transversely of the longitudinal axis of the ma-.chineontheirrespectiveyokessothatthem chine may be supp rted on therollers and travel along a track, pipe or other object which object -maybe disposed longitudinally through the machine. 1

"As shown in Fig. 18, the pair of guide rollers in yoke 8 with theirsizes parallel are mounted on the outer ends oi. levers it which leversare pivotally supported on and attached to the yoke at their ends by theshalt li.- Springs "which are compressed between the'yoke l and thelevers between the pivotal support I l and the rollers tend to hold therollers in an extended position and toimpresslever ll away from cam IIwhich is-mounted to tumjon a shaft ll in-the yoke '8 and isoperated'bythe wheel iii when themaehinerestsontherollers,the-springsarecom-E '45 to regulate theelevation of the roller.

when the weight of the machine rests on the object and they providefor'changing the alignment of the pipe in the machine.

The lower pairs of guide rollers l in the yoke 3 are similar to therollers S and are diametrically opposed to the rollers 8 so that theycan be:

brought up snugly underneath the object which supports the machine whenit is rolled along the pipe. -As shown in Figures 16 and 17, the rollersl in yoke 3 are mounted to revolve on the shafts, in the mounting 2|which has lower faces 22 inclined toward each other. Sliding collars 23with inclined faces engaging the inclined faces 22 are threaded on theshaft 24. The threads on shaft 24 are right and left threads and mountedto be turned in the yokes by means of the hand wheel 25. When the handwheel 25 is turned in one direction the collars 23 will move toward eachother and elevate the mounting 2| 2's and rollers 20 to engagetheobiect. Movement ofthe hand wheel- 25 in the opposite directionpermits the rollers to recede frohrthe object. Tongues 26 on theopposite sides of the mount.- ing 2| slide in grooves 21 in the yoke Iand prevent longitudinal movement of the rollers.

" Single rollers i are mounted-on a sprin mount-. ing in yokes l and 5.The rollers G constitute the upper aligning members and serve as hearingmembers when the machine is rolled along a pipe. The rollers are mountedon a shaft 28; The shaft is supported by a guide member '29 which isadapted to slide up and down in a guide slot inthe yoke. A spring 28'which impels the roller outwardly is mounted between the end of theguide member 29 and the-yoke and a shaft 29' having a camsurface ismounted on the yoke and passed through an opening in the guide member.'The shaft 28' is turned by the hand-wheel and the cam engages thesurface in the guide member f The lower guide rollers I in yoire's 4 andI are preferably mounted like rollers I. They may be supported on shaftswhich are supported in turn .on mountings which have an inclined lowersurso face and the mountings may be raised and loweredby the hand wheels25 which are threaded to move. the'inclined surfaced collars backan'dforth ina manner similar to'the lower rollers 1 in. t ro e a Whentheobject is engaged by the rollers I andLitmaybeclampedbyactuatingthejawsI in the'yoke l-to clamp the relatively fixed pipe and the machine inalignment. Another set of jaws II is mounted in the longitudinallymovable so ring clamp 82 to clamp the. relatively movable pipe. "Thelaws and 3| are similarly constructed. Four jaws diametricallyspacted.as shown in Fig. 8, are preferably used in the yoke I. and in the ringclamp 3.2 so, that the object which is held-from vertical-movement bythe rollers 8 andJ wlllbe held from longitudinal movement when it isengaged-by the jaws. As shown in Figures 7 and 15, the gripping faces 22of the jaws are roughened to bite into g the ,objeet .to'be clamped; Thelaw moves in and out radially in a longitudinal slot which is cut in theinternal surface of the yoke-8 and the ring clamplj-to provide abearingsurface "tor-the laws 8 and ii, which is inwardly in-' clined awayfromthe space between the yoke and the ring clamp. The correspondingface of the Jaw is inclined so that the gripping face will be movedradially and longitudinally of the object to be gripped when the law ismoved in, one direction. Each of the iawsjland 3i are 5 operated bypistons in cylinders 35' in'the yoke 2 and the ring clamp 32. The axisof the cylinders 25' are parallel to the inclined surfaces" 24 and theouter end 'of thejpistons 35 abut against an abutment 26 on the jaws 8and 3|. A 10 slot 29 parallel to the surface 3| is formed in each of theJaws 8 and iii. A pin 38 ispassed' through the slot and is secured oneach sidein the yoke 2 and the ring clamp 22. A spring 40 is compressedbetween the pin 38 and the lower 15 end "of the slot so that it urgesthe Jaws to\the lower end of the incline 34. .When the fluid pressuredrives out the piston to clamp the obiect, the spring Iii is compressedand when-the fluid pressure on the piston is released the springs 20return the jaws'to their initial position where they are stopped by theengagement of the end member 36 with the face of the yoke 3 or the 'ringclamp 32. The Jaws 8 in the yoke I and the I jaws 31 in the movableclamp 32 are preferably 25 arranged to move in opposite directionslongitudinally and away from each other when the objects are clamped butthey may be arranged to move in'the same direction. The roughenlng ofthe jaws is preferably in the form of wedge- 30 .shaped teeth or ridgeswhich are inclined toward the plane in which the pipes are-joined sothat when the ends of the pipes are driven together. the ridges or teethwill be forced into the pipe and prevent slipping. 35 h e longitudinallymovable ring clamp 32 may consist .of upper and lower .parts which aredl-I vided' along theplane of division of the side I beams l and theyokes}, 4, and 5 and held together by bolts 44. The ring clamp "ismounted to slide on rod supports 45 which are supported in turn at theirends to slide in the yoke l and at their other ends to slide in thehydraulic cylin-' 'ders on the pistons 48 which are mounted in yoke 8.Springs 41 are mounted on the rods 45' so that the springs can becompressed between the clamp sring I2 and spring stop members It on therods when the rods are propelled in one direction by fluid'pressureacting on'pistons It in the cylinders 48', 50

The, clamping ring 22 moves with the relatively. movable object andoperates on-the relatively movable object in producing the. weld. Thering 22 is actuated in one-direction without turning y the springs 41which are compressed against the clamping ring and impress forces on itwhich produce an impacting of the ends-of the'AandIBwhenthepipesarehe'atedto a wel temperature the ring -32is'releaseds The ring 22 is actuated in "the opposite direction sowlthoutturning the pipe held against the impactproducing forces whichareimpressed upon it by the springs 41, and released without turning thepipe so as to permit theclamp and relatively movable pipe to moveforward at a highyelocity 65 andstrlketheiixedpipewlthasharphammerblow.by means oil the adjustable stop members -or involute earns 80,

- An irreversible mechanism is provided to position ring 82 in anintermediate and 70 withdrawn position, and aiso,'to"release'theclampingringto permit itto be forced'to a forward position under the action ofthe impact pro-'- ducing forces impressed on the .clamping'ring.

- By irreversible mechanism it is intended a mechlit 2 anism whichcannot be actuated by the forces exerted by the springs 41. Theirreversible mechand the other end is connected to toggles whichcomprise arms 53 and 54 supported on yokes 4 and 5 respectively. Themidpoints of the toggles carry pins 60 upon which rollers 52 aremounted. .The rollers 52 engage quadrant cams formed on the cylindricalsurfaces of the quadrants 63. The quadrants 63 on opposite sidesof themachine are turned as a unit on the shaft 54 by a hand wheel 65 througha train of gears as hereinafter to be described. Turning. the quadrantin one direction causes the rollers 52 to travel from the impact orforward position 15' on the face of the cam 53 along the face ill to thepoint 12 of the cam where the toggles are placed in the clamping"position. In the clamping position the involute cams 50 and ring clamp32 are in intermediate positions. The jaws 8 and M in the yoke 3 and inthe clamping ring 32 are then actuated to grip the end to end contactingpipes.

By turning the quadrants in the opposite direction the rollers 62 movealong the surfaces 13 of the cam to rest, position 14 and .bring thetoggles up to or nearly to their dead center as shown in Figure 2. Inpassing to position 14 the involute cam 50 is turned and it withdrawsthe v clamp 32 along its supporting rods and spaces 35., the end of themovable pipe B a short distance,

say 1 inch, from the end of the fixed pipe. With the clamp 32 restrainedin position M by the involute cam 50, the springs 41-are compressedbetween the spring stops 48 and the pressure ring 32 by impressing fluidunder pressure onthe pistons 46, moving the rods 45 and forcing stops 48against the springs 41.

When the ends of the pipes are heated to a welding temperature by adevice hereinafter to 45 be described, the quadrant '83 is turnedslightly to carry the rest position 14- of the cams past the rollers 32and carry the throwing face 14' of the cam 53 against the rollers52 tothrow the toggles over the dead-center point. This permits the toggle tobuckle and throw the roller 62 through the free space I5 in the cam,carrying the involute cam 5ll instantaneously.into an extreme forwardposition. and permitting the springs 41 to throw the clamp ring 32 andthe movable pipe clamped 55 thereto-without restraint and at a highvelocity against the end of the fixed pipe.

The size of the springs 41 is regulated and the amount of compressionproduced in the springs by'the forward movement of therods 45 and springstops 48 is regulated sothat the ends of theheated pipes will be given asharp forcible hammer blow upon impact thus forcibly ejecting .surfaceoxides from the heated ends and'cons'olidating the ends of the pipes.The free spaces I5 in the cams are made wide enough to permit theinvolute cams 5!]. the clamping ring 32 and the relatively movable pipeto move forward farther.

' than their clamping positions so that the heate'd pipes will form acircumferential head around 701 the pipe when .the pipes are impactedand the impacted ends will remain forcibly compressed without reboundingat the end of the stroke.

A miter gear 33 is actuated by the hand wheel 65 and meshes with themiter gear 8| to turn the worm 32 which in turn meshes with thesegheader E, and lines 34 and 91 by opening thevfi ,valve F. Pressuregauges B and C are suitably tips are positioned sufliciently close tothe pipes to" be welded so that each pair of oblique flames together. g

ment gear 33 on the quadrant 33. The quadrant cams are keyed on a shaft.54 which is supported at its ends and journaled in-brackets 35 on theframe I so that the cams and toggles on both sides of the ring 32' areactuatedas a unit.' 5

The clamp Jaws in the yoke 3 and in the clamp-, ing ring 32 and thehydraulic spring compressing pistons 45 in the cylinders 43' areactuated by-a central fluid pressure system which ismounted on the upperI beams I, as shown in Figs. 1, 2, 5,10

'6, and 19. -The system consists of a pump which may be manuallyoperated by a handle'attached' to a reciprocally movable piston in thecylinder 3|. A fluid pressure line 32 with branches. leading to theconduits 31 of the cylinders 35 .in the 15 yoke 3 is connected with thefluid under the pump pressure and regulated bythe valve H.- Line 92communicates with the valve H through a header D. From the header D apipe connection is made to line 92 and flexible'conduits 93 20 leadindividually to the four cylinders 35 in the clamping ring 32. Fluidunder pressure is supplied by the pump to the four spring compressingcylinders 45' through valve G, header E and pipe 94 which is connectedto the cylinders by 25 passages 34' through the yoke 5. -The'fluid isretained under pressure in the clamp compressing'cylinders 35 and in thespring compressing cylinders 46 by turning the shut-off valves H and Ginthe pressure lines. 3. The pressure in the jack compressing cylinders isrelieved by opening valve 0 in line (a) and returning the fluid to thepump. The fluid in cylinders 45 is returned to the pump throughtheconnectedin the pressure lines to indicate the pressure in the springcompressing cylinders 45 and the clamp compressing cylinders '35 re--spectively. 40

A plurality of torches I III are mounted on a split bored burner ringill with their tips 2 arranged circumferentially on a diameterlarger'than the pipesto be welded and near the pipes so that the ends ofthe pipes can be brought together without engaging the tips. The burnerring III is mounted ona cylindrical hose reel I [3 which reel is adaptedto revolve ona split collar H4 on yoke 3. The burner ring III ispreferably made in two parts and joined by a gas tight connection, asshown at III in Fig. 9. The ring has a circumferential combustible gaspassage "5 and a corresponding oxygen passage Hi to conduct gases to themixers ill for each of the torches. The mixed gases pass through thetorches to the tips 2 which have twmterminal bores H3 and I i9 arrangeddiametrically in the tips. The bores li3and H3 direct the flamescrosswise and at an angle of about 50 degrees to each other so that theflames do not impinge upon each other. The

are directed on opposite end faces of the spaced pipes. In the preferredadjustment of the torches the orifices in the tipsare arranged betweenthe planes of the end surfpces of the pipes to be .welded and in a planeapproximately midway between the ends. The flames which impinge on agiven end face of a pipe are reflected back onto the end face of theother pipe. Thus, the inner layers of metal will be heated to a highertemperature than the outer. layers so that an outwardly extendingcircumferential burr will be formed when the ends of the pipes arestruck 120 on the arms I2I. The rollers engage the flanges I22 of thedrum H3 and slide the drum over the collar III.

The arms I2l constitute a yoke which is mounted to turn on a shaft I28adjacent thesend yoke 3. A handle I21 which projects over the edge ofthe frame through a slot in a guide plate I25 bolted to side I beam I isadapted to rock the yoke back and forth. The handle I21 may be threadedon the arm I29 so that it can be screwed down against the guide plateI25 to lock the yoke and the torches in any desired longitudinalpositioh.

ble connections I3I and I32, yielding connections "I3l' and 132' on theends of the hollow, shaft I35, passagesi33 and I34 in the hollow shaftI35 to hose connections I38 and I31 respectively. The

hoses I38 and I31 are passed through openings in the storage drum I38and wound around the drum I38, which iskeyed to the shaft I35. The otherends of hoses I38 and I31 are passed through openings in the drumsII3-and are attached to gas and oxygen passages H3 and H3 in the drum 3which connect with the passages H5 and IIIiinthering III."

Suflicient lengths of the hoses I38 and I31 are preferably wound aroundthe storage drum I38 in the grooves'.l38 so that the drum II3 may-berevolved forward and back through a given number of completerevolutions,- say two. In this operation the hoses are unwound from drumI38 and wound upon the drum I I3 in the grooves I30. The storage drumI38 has a flange I on one ,end and a ring gear I42 on the other end. Thediameter of the storage drum I38 about which the hoses are wound issmaller than the diameter about which the hoses are wound on the maindrum II3. Inorder'to wind the same length of hose on the smaller drumI38 as it isunwound from the larger drum II3, the smaller drum is madelonger to provide for a greaternumber of turns oi! the hoses thereon.The drums are so geared thatftheir peripheral speeds are equal,

therefore in order to compensatejfor the differshaft I35 is permitted toslide longitudinally in its journal I44 and the other end of the shaftI35 is provided with threads I35 which coact with threads in the'shaftjournal I to c use the shaft 7 I35 and the drum I38 to travellongitudinally at a rate' proportional tothe peripheral travel of thedrums as may be required to keep the portion of the hoses which extendbetween the drums in line with their grooves as the hoses are wound orunwound from the drums. Where the diameter with an elongated pinion I50which is mounted on the yoke 3. A miter gear I 5| on the pinion I50meshes with a miter gear I52 on a shaft I53 and Combustible gas andoxygen or air are con- 'ductedto the torches I I0 from. sources ofsupply through the compound shut-off valve I30, flexi- The torches 0 thetrain is operated through theshaft I53 by the crank I53. By turning thecrank I 53 in one direction the storage reel I38 feeds hose onto thearound the ends of the spaced pipes whilst the obliquely directed flamesimpinge on the confronting faces of the pipes. In heating the ends ofthe pipes to a welding temperature, it is usually sumcient to give thetorches two complete revolutions around the pipe and to return them totheir initial. position. The turning of the torches through one or morecomplete revolutions avoids unequal circumferential heating of the pipeswhich would occur if the torches were rocked through a smaller angle andone torch.

were not adjusted to give a flame exactly like the others. t

are mounted on'the ring III which is mounted in turn on the drum II3. As

shown in Fig. 11 the oxygen and gas which are conducted to thecircumferential passages II5 I and I18 respectively by theoxygen-and-gas conducting hoses are connected through the passages I andI82 respectively with the gas mixer. Regulating valves I84 and I68 areseated in the passages I80 and I82 to regulate the fiow'of oxygen andgas to the mixers. The valves are similarly'constructed and comprise athreaded head I88 on the valve operating rod which is screwed into athreaded countersunk bore I10 in the-ring III. The threaded heads I88may be slotted so that they can be turned out min with a screwdriver tovary the gases supplied to ,the mixers. When the valves are adjusted thebore I10 is sealed by the plug I89.

The mixers are contained in a tapered plug I1I which is accuratelymachined to form a gas tight connection in a-tapered bore in the ring 'II I. The

plug I'1I has an annular groove I12 which connects with the oxygenpassage I80 and with the radial bores I The plug I1I is given aflatbottomed inner bore and the outer end-is thread-f 2. The mixingnozzle I15 is mounted 'in the The inner end of the mixing nozzle I15 ismade to fit the lateral surfaces of the inner boreand the outer end ofthe nozzle is enlarged and threaded to engage the threaded portion ofthe bore "so that the nozzle can be screwed down on a gas tight seat I18and the flattened end of the nozzle can be spaced 2. short predetermineddistance from the flattened bottom of .the bore.

A'reduced portion between the ends of nozzle I15 provides an annular gaspassage I11 around the nozzle.

I18 which form gas passages between the annular passage I11 and thenarrow passage I80 between passage I82. constitutes a gas passage aroundthe plug I1I. Communication between the annular The end I! the mixer ispierced with a plurality of small regularly spaced bores groove I8I andthe'pas'sage I11 is made by bores I82 through the wall-of the plug.

70 The mixing nozzle I15 has a smooth internal axial bore I83 which isterminated at its entrance by a small restricted bore I85. The bore I85opensinto a space I88 between the threaded head I I81 of the nozzle anda plug I88 which is screwed into-the end of the plug I'll.

, aosaaoa- The bore I99 is coextensive with a similar bore I99 throughthe inner end of the plug III; the bore ill in the nipple I92 and thebore I99 in the goose-neck IN.

The oxygen which is supplied to the passages H5 in the ring III, passesthrough the bore I99, around valve I69 to passage .1 I2 and through thebores I14, I95, and. I94 to the end of the nozzle I'I5'where it mixeswith the gas which comes around the flattened end of the nozzle. The gasfrom passage II9 passes through the bore I62.

around the valve I88 to the annular passage IflI,

t v and then through the passages I92, annular passage Ill and holes I19into the narrow passage I80 at the end of the nozzle Ill. 'The gases aremixed and conducted to the nozzle tip through the passages I99, I9I andI99.

The tapered plug III has a reduced portion NIB-at its outer end whichforms a recess for the hollo'w plug I99. The plug I99 is externallythreaded to screw down over the reduced portion I99 and a packing may beheld in the space at the inner end of the plug to produce a gastightjoint and hold the tapered plug III in place. I The outer end of thehollow plug I99 is externally threaded 'and faced at the end to fit theQ 1 rounded end of the goose-neck I99. A union 209 is screwed. down onthe external threaded end of the nipple so as to engage a shoulder 292on the goose-neck and hold the goose-neck in place. Adjustments in the,positions of the torches maybe made by loosening the nuts 299. I Theoperating devices for controlling the gases, the torches, the quadrantcam, and the hydraulically operated mechanisms are shown mounted 'alongone side of the machine within reach of 1 1 one operator who may bestationed 'at one side the toggle at in Fig. 2.

of the machine. I In operation the machine may be aligned with a fixedpipe A along which it may be rolled'onthe rollers Ii, and positioned sothat the end of the pipe will be located approximately within the circleof torch tips II2.- The relatively movable pipe B is'aligned in themachine with its end in contact with the fixed pipe. The pipes A and Bmay also be placed on skids and the machine maybe rolled on both pipes.The lower guide rollers .l are brought into contact with the pipes andthe hydraulic clamping jaws 9 and 9I in the yoke 9 and pressure ring 92are operated toclamp the pipes by opening the valve H and operating theoil pump to produce the desired fluid cated by the pressure gauge G. Thevalve H is thenolosed. Before the ring 92 is clamped it is placed in theclamping position by bringing the toggle roller 62to the 'point I2 inthe cam99 with the ring 92 in contact withthe ln'volute, cam ill.

{.After the pipes are clamped, the quadrant cam is operated to bring theroller 9| to the rest point I9, thereby withdrawing the ring 92 andmovable pipe'a short distance to spacethe ends 01' the pipe; as shown inFig. 11, and positioning 05 about its dead center as shown The springst1 nre compressed between the 1 spring-stops 99 and the ring 92 byopening valve G, and pumping oil through'the header E and line 99 untilthe desired pressure .is indicated by the pressure gauge B. The oilpasses under pressure against the pistons T99 which slide the rods 99through the openings in the ring 92 andthe yoke land compress thesprings ll between the the impacting of the pipes so as to prevent themitting the metal to cool. It is advantageous to clamping ring 92 andthe spring stop 99. The valveGisth'enclosed. r

' The torches; adjusted around the'spacing between the pipes, lightedand the ends of the pipes are heated'to a welding temperature by re-.volving the torches through at least one complete revolution inthrmanner hereinbetoredej scribed. a desirably equal distribution ofheat, may be obtained by giving the torchestwo complete revolutions andthen'returning-them to 10 their initial positions. When'the ends of thepipes are to welding temperature, the

quadrant cam 99 are moved in the direction of v the leader arrow 99 inFig. 2 to throw the toggles over their dead centers and freely releasethe least cooling of the metal before the impact, but the fiames'may bediscontinuedby operating the quick shut-01f valve I 99 just at themoment of impact or at other desirable times without perimpact the pipesas soon as the ends of the pipes have attained a welding temperature toavoid overheating the metal. a

By traversing the weld with the flames aiter down to smooth the weld tothe diameter of the the impactingtoi" the pipes, the burr is melted 35pipes and to fuse together the outer layers or metal which in someinstances may not have been perfectly welded by reason of their slightlylower temtgleratureas compared to the inner layers of me In the use ofheavy machines for welding large sized pipes, the fixed pipe and themovable pipe may be supported and roughly aligned on skids and themachine may be transported along the pipes as upon a track by rolling italong on the upper rollers 9.

The parts oflthe machine which encircle the pipes have been described-asconsisting of upper and lower parts so that the machine may he takenapart and placedaround a pipe line without otherwise disassembling themachine. It is also contemplated bythis construction that the 1 upper orthe lower parts of the machine may be separated, as by hinging'so as toopen up and admit of the placing of the pipes in the machine.

It is evident that the bi-parted elements of the machine may be made inone-piece and vari modifications of other specifically describedstructures may be made without departing from 00 the invention.Therefore I do not wish to restrict my invention except by thelimitations imposed by the prior art and by the invention 3 defined inthe annexed Iclaim: I

able object, a clamping ring adapted to clamp the relatively movableobject, means on the frame to support the clamping-ring and permitlongitudinal movement with respect to the frame, and a spacing andreleasing irreversible mochantsm adapted to-position the ring inpredeterintermediate. and withdrawn positionsfiii to supportthe-clamping'ring and permit longiand thereafter a forward movement ofthe ring beyond theinterniediate position, said machine having, meansfor impacting the ends 'of the objects to be weIded after the endshavebeen raised to a welding temperature.

2. A welding machine which comprises a frame, means on the frame toalign therewith a relatively fixed object and a relatively movableobject, a clamping ring adapted to clamp the relatively movable object,means on the frame tudinal movement with respect to the frame,

and a spacing and releasing irreversible mechar hism adapted to positionthe ,ringin predetermined intermediate and withdrawn positions andthereafter permit an unrestricted forward 'movement of the ring, saidmachine having means for impacting the ends of the objects to be weldedafter the ends have been raised toring and permit-relativelylongitudinal movement'of the ring with respect to the frame and thesupports, and a device adapted to position the intermediateposition;

the ring in predetermined intermediate and withdrawn positions, meansfor storing energy against said ring between'said ring and said 1 frame,means to suddenly release-said energy to cause a forward movement of thering beyond 4. A welding machine which comprises'a fframe, means on theframe to align therewith and clamp a relatively "fixed object, means todispose a relatively movable object in 'alignment with the fixed object,a clamping ring ea-,

pable; only of longitudinal movement and adapt ,ed to clamp the movablepipe, means to space the ring in predetermined intermediate ;andwithdrawn positions, means to impress'impac'tproducing forces on thering when it is in the withdrawn position, and means'to release the ringunder-the pressure .of the impact producing forces. I

' 5. A welding machine which comprises a frame; means on the frame toalign therewith andclamp a relatively fixed object, means to dispose arelatively movable object in alignment with the fixed object, means toclamp said ohjects,-means to support said clamps, said clamping meanscomprising jaws having a lower,sur-

, face inclined to the axis of the objects'asid adapted to coact withsimilarly inclined portions of their supports, hydraulic cylinders onthe supports, hydraulic conduits connected to said cylinders and to asource of pressure, pistons in said cylinders to 'advance'the jaws alongsaid'inclined surfaces, means on the jaws to engage said pistons, andmeans disposed between said Jaws and the supports to return the jaws tonon-- clamping positions.

6. A welding machine comprising means to align and fix a relativelyfixed pipe and a relatively movable pipe therein in spaced apartconfronting relation, a plurality of torch tips arranged on acircumference which is greater than the circumference of the pipes to bewelded and provided with means to heat the confronting ends of thepipessimultaneously, means rotatable about'the axis of saidpipes to support.said

tips, means to supply gases tosaid tips which includesa pair ofrotatable and longitudinally movable rotors adapted to carry flexibleconduits, and means to store impact-producing forces on the clampingmeans for said movable pipe.

'l. A welding machine comprising means clamp a relatively fixed pipe anda- 1 align and relatively movable pipe therein in end to end contact, alongitudinally movable clamping ring adapted to clamp said movable pipe,a member or spacing, restraining and releasing said ring, a togglelinkage adapted to operate said member, and means to dispose said togglein predetermined intermediate "and dead-center positions and permit anextreme releaseposition, said -means comprising a cammed member, and aprojectingmember on the toggle to engage said cammed member. Y t

' 8. A welding machine comprising a frame; means on said frame to aligntwo pieces of pipe to be welded; aclamp for clamping one of said pipesin a fixed position and "a second clamp for clamping the other pipe inan axially slidable position; a means for operating said second clamp,said operating means comprising a toggle linkage having one endoperatively connect- I ed with said second clamp and the other endcontact, a longitudinally movable clamping ring Y adapted to clamp saidmovable pipe, cams adapt-" ed to engage said ring for moving the ringlonmprising means to v gitudinally into. a-spaced position, forretaining r the ring and for releasing the ring, a toggle link ageadapted to operate-[ said cam, and means to dispose said toggle inpredetermined intermediate and dead-center positions and to permit anun+ =restricted release thereof, said meansjcompris ing a secondcam, aprojecting member on'the toggle to engage said second'camja'nd means torotate said second cam.

10. In a welding machine, the combination of a heating device comprisinga rotatable burner head, a means for supplying said head with separatesupplies of oxygen and a combustible gas comprising a reel secured tosaid head androtatable about the axisof said head, a second reelrotatable ona hollow journal substantially parallel to the axis .of thefirst re'el, an oxygen hose connected to an oxygen passage in said headat one endand adapted to be supplied with oxygenat .the other end,through said hollow journal, a combustible gas hose connected at one endto a combustible gas passage in said head and adapted to be connected atthe other end to a combustible gas supply in said hollow journal, eachhose beingwound in the same direction as the other hose on the samereel, and a means for simultaneously turning each reel at the samecircumferential speed to wind the hose on one reel as it is unwoundfromthe other reel. I

11. A welding machine comprising means to align and clamp a relativelyfixed pipe and a.

relatively movable pipein end'to end contact,

means to' space said pipes after they are clamped, meansto storeimpact-producing forces on said clamp for said movable pipe, and meansoperable before, during and aftersaid ends are in contact to heat theends of the pipes including a conduit and means for reeling saidconduit,

said reeling means comprising a pair-of spirally grooved rotatable andlongitudinally movable align and clamp a relatively fixed pipe and arelatively movable pipe in end to end contact, means to space said pipesafter they are clamped, means to store impact-producing forces on saidclamp for said movable pipe, and means operable before, during and aftersaid ends are in contact to heat the ends of the pipes includingconduits and means for reeling said conduits, said reeling meanscomprisinga pair of spirally grooved rotatable rotors, means to actuatesaid-rotors, ,a hollow "threaded shaft on one of said rotors, yieldingconduit connectors on the shaft, and threaded means co-operating withsaid shaft to actuate the drum longitudinally when it is turned;

13. A welding machine comprising a frame, means to align and clamp arelatively fixed pipe and a relatively movable pipe therein, alongitudinally movable clamping ring comprising clamps for the movablepipe, elongated longitudinally movable members for supporting the ringslidable in one portion of the frame, hydraulic cylinders on anotherportion of' the frame to actuate and support said members; springs onsaid members, and stops on said members to, compress the springs againstsaid ring when. the longitudinally movable, members are moved iifonedirection.

14. A welding machine comprising a frame; means to axially align andclamp a relatively fixed pipe and a relatively movable pipe therein;mechanism on said frame for moving said movable pipe along the axisof-said aligned pipes, said mechanism comprising a clamp slidable alongthe axis of said pipes and adapted to be clamped to said movable pipe,means for restraining and releasing said slidable clamp, aresilientmeans coacting with said slidable clamp, a hydraulic cylinder and apiston operating therein to compress said resilient means between saidframe and said movable clamp'to urge said slidable clamp against saidresLrnlning means.

15. A welding machine comprising means to space articles to be welded inpredetermined-com fronting relation, means to heat the, confronts ingspaced faces of said articles which includes a. rotatable support havingmeans to conduct,

gases, a plurality of torches on said support, and a gas mixer mountedin said support, said mixer comprising a plug having a centrallydisposed bor'e having a flattened shoulder therein, and an axially boredmixing nozzle having a flat end spaced from said flattened shoulder toprovide a narrow gas passage, an enlargement on the flattened end of thenozzle traversed by a plurality of gas passages, the other end of thenozzle having means to space the nozzle and a constricted passage toadmit a jet of oxygen into the axial bore.

' 16. In a pipe welding machine a means for heating the ends of pipes tobe ,welded, said heating means comprising a rotatable ring supportedcircumferential oxygen and-combustible gas passages to each of saidmixers, and a means for supplying oxygen and a combustible gas to saidrespective oxygen and combustible gas passages.

I .17. In a welding machine, the-combination of a heating meanscomprising a rotatable torch support having means to conduct gases fromsources ofsupply to gas mixers, a, tapered plug mounted in'said supporthaving a centrally disposed bore therethrough with a portion at one endenlarged so as to give a flattened annular bottom to the enlargement, amember having-a bore coextensive with said centrally disposed bore tosecure the plug in saidsupport and to support in turn a torch tip, aflat ended mixing nozzle spaced from the flattened bottom of saidenlargement, to provide an annular gas passage, said nozzle having acentral oxygen bore coextensivewith the bore in said plug andcommunicating with the annular passage, "an enlarged end on said mixingnozzle fitted in said enlarged bore and traversed by a plurality of gaspassages communicating with said annular passage, another enlargedportion on said nozzle having a constricted passage to admit a jet ofoxygen to the central oxygen bore, and means to regulate the flow of gasand oxygen to said mixing nozzle.

18. In awelding machine, the combination of a pipe, heating meanscomprising a rotatable torch support having means to'conduct gases fromsources of supply, at least one gas mixer and at least one torch onsaid,sup'port adapted to receive said gases, the torch'havinga tip witha plurality of terminal passages directed obliquely in an extendedposition, adjustable cam means to limitthev return movement of saidrollers, and means to adjust said cams. I

20. A support for a welding machine in combination with a pipe alignmentmechanism which comprises a frame, yokes on the frame to carry aligningand supporting rollers which include roller supporting members havinglower faces inclined to the axis of the frame, internally threadedcollars having external inclined plane surfaces to coact with the lowersurfaces of the roller supporting members, rotatable shafts mounted inthe yokes and threadably engaging said collars to propel the collars ineither direction, and means to prevent circumferential and axialmovement of the roller supporting mem-.

bers.

21. In a welding machine, the combination of v a frame carrying astationary clamp, a movable clamp, each of said clamps having movablejaws, a means for storing impact producing energy upon said movableclamp, means for producing said energy in said storing means;'a fluidsystem for-operating said jawsand s'aid energy producing-means, saidsystemicomprising at least one cylinder in each of said clamps and atleast one cylinder on said frame, a piston ineach of said cylinders forseparately operating said jaws and said mean's'for producing energy insaid storing means; a fluid conduit between said pump and each of saidcylinders, in said conduit for releasing the fluid from said conduit.

22, A portable ap iatus for fusing, together for a welding machine whichI

